Chatology is message search made simple.If you use Messages or iChat, you probably know that searching messages to find important info from past chats can be frustrating. Perhaps you couldn't find what you were looking for, or your Mac slowed down so much that you gave up.
Chatology makes it easy to:

Find your messages instantlyFocus on a specified date rangeQuickly isolate images or links from your messagesChatology helps you find exactly what you're looking for without frustration.

RequirementsIntel, OS X 10.7 or later

What's NewVersion 1.0.3:

Command-F shortcut now works on all keyboard layoutsTimestamps are now included in exported logsTimestamps and notices are now selectable in chat transcriptsFixed an issue with some users could appear incorrectly when searching by userFixed a problem with iMessage attachments sometimes not appearing correctly